Jack is back! Jack Dorsey, the CEO of both Twitter and Square, has made an appearance at Sun Valley for the last several years.Getty / Drew Angerer

It's that time of year again.

Investment bank Allen & Co. is hosting its 34th annual conference in Sun Valley, Idaho, and many of America's wealthiest and most powerful businesspeople in media, technology, and sports have swarmed the scene.

We've grabbed photos so you can see which power players made it out to Idaho this year.

The conference usually spans the first week in July and is something of a 'summer camp for billionaires,' featuring talks about business and the economy ...

Getty / Drew Angerer

... as well as activities like rafting, cycling, and golf.

Getty / Drew Angerer

And because the conference brings together such a smorgasbord of top executives, it's credited for kindling major mergers like Comcast and NBC and blockbuster acquisitions like Jeff Bezos' purchase of The Washington Post.